Insane idea number 148
Large dart shaped craft is hurled at Mach speed by a maglev launch sled, a solid rocket motor propels ship fast enough that plasma is produced on tip of a sacrificial rod that extends from the heat shield, at the base of this rod is a small D-t fusion reactor confined with a intense magnetic field, this field repels the "rod plasma" creating a bubble, insulating the ship and boosting the field density by compresing it, at a point near the rear of the ship the D-t plasma is added to the wake plasma, using a vasimir style system the plasmas heat can be exchanged into thrust...
Superfast non crispy ship